Results 51 to 60 of about 2,055 (180)

Thermal energy storage as a way to improve transcritical CO2 heat pump performance by means of heat recovery cycles

open access: yesEnergy Storage and Saving, 2023
Electrification of the heating sector is a major target of energy transition towards a more sustainable, efficient, and less polluted future. Heat pumps are considered more suitable than electrical heaters or fossil-fueled boilers; however, common ...
Chiara Mancinelli   +3 more
doaj   +1 more source

Single‐Cell Profiling Reveals a Protective WNT5A‐ATF3‐FOSB Signaling Axis in Hair Follicle Stem Cells During Androgenetic Alopecia

open access: yesAdvanced Science, EarlyView.
Androgenetic alopecia (AGA) is a common form of hair loss with limited treatment options. Silencing of WNT5A signaling, which is widely known as the trigger of the ncWNT signaling pathway, happens in hair follicle stem cells from balding areas. It leads to downregulation of ATF3 and its target FOSB.
Ruiyu Luo   +10 more
wiley   +1 more source

Investigation and Analysis of R463A as an Alternative Refrigerant to R404A with Lower Global Warming Potential

open access: yesEnergies, 2020
This research presents the development of R463A refrigerant, a nonflammable refrigerant that was retrofitted to replace R404A. R463A is primarily composed of hydrofluorocarbons/hydrocarbons/carbon dioxide (HFCs/HCs/CO2), and has global-warming potential (
Piyanut Saengsikhiao   +4 more
doaj   +1 more source

Ablation‐Immune Thermal Armor Via Microstructural‐Compatibility Design for Extreme Thermal Conditions

open access: yesAdvanced Science, EarlyView.
This study unveils a microstructural‐compatibility design strategy that integrates reactive melt infiltration with plasma spraying to fabricate carbon fiber‐reinforced ZrC‐SiC composites. The deliberate incorporation of SiC into the ZrC coating releases heat accumulation, suppresses detrimental lamellar ZrO2 formation, and reduces residual stress. This
Hongkang Ou   +6 more
wiley   +1 more source

Current Estimates on Greenhouse Gas Emissions in China Between 1970 and 2023

open access: yesAtmosphere
Between 1970 and 2023, China’s yearly anthropogenic CO2 emissions increased from 0.96 to 13.58 Pg. Yearly non-CO2 greenhouse gases (GHGs) in China increased from 1133.7 Tg CO2eq in 1970 to 3095.3 Tg CO2eq in 2023. In terms of weight of the global warming
Sifan Yao   +4 more
doaj   +1 more source

VIBRATIONAL OVERTONE SPECTROSCOPY OF HYDROFLUOROCARBONS

open access: yes, 2002
Author Institution: Department of Chemistry, Williams CollegeThe vibrational overtone spectra of a series of hydrofluorocarbons, including hexa- and heptafluoropropanes, were recorded up to six quanta of CH-stretching excitation.
Thoman, J. W., Jr.   +2 more
core   +1 more source

Ionic liquids for the separation and recovery of fluorinated refrigerant mixtures

open access: yesSustainability Science and Technology
The transition to low global warming potential refrigerants and the phasedown of hydrofluorocarbons, many of which are near-azeotropic mixtures, have created stockpiles of legacy refrigerants that are increasingly difficult to separate and reuse.
Clarice M Sabolay   +3 more
doaj   +1 more source

Research on Heat Transfer Enhancement of Spiral Grooved Tube Heat Exchangers Based on CFD and Artificial Intelligence

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Driven by the energy crisis and carbon neutrality goals, high‐efficiency heat exchange equipment has become a core demand in the industrial sector. The spiral grooved double‐pipe heat exchanger exhibits significant heat transfer enhancement advantages, yet it requires balancing heat transfer efficiency and pressure loss.
Yueyun Yang, Wei Li, Xiuzhi Xi, Neng Gao
wiley   +1 more source

Silicon Nitride Surface Modification by Ion Bombardment with Physisorbed Hydrofluorocarbons: Theoretical Assessment

open access: yes, 2023
We present key pathways involved in bombardment-induced modification of amorphous silicon nitride (SiN) surfaces with physisorbed hydrofluorocarbons (HFCs), based on tight binding molecular dynamics (TBMD) simulations.
Gyeong S. Hwang (1283838)   +1 more
core   +1 more source

A Systemic Model for Understanding Business Interactions With Biodiversity and Ecosystems

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT Biodiversity loss and ecosystem degradation represent critical threats to human well‐being and economic resilience, challenging businesses to understand and manage their interdependence with natural systems. This study develops a systemic framework—the BioModel—that elucidates the reciprocal relationship between businesses, biodiversity, and ...
Lino Cinquini   +2 more
wiley   +1 more source

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